import tkinter as tk

top = tk.Tk()
top.title('Hello Tk')
top.geometry('640x480+100+100')
top.resizable(False, False)
btn = tk.Button(top, text = 'btnbtnbtnb\n\nbtnbtnbtnb', width = 10, height = 2)
# btn = tk.Button(top, text = '确定', width = 10, height = 2)
btn.pack()
top.mainloop()

